Gamers pour millions of hours into top titles, but we never really had a good way to measure who is playing what across multiple platforms. That is until Raptr, a social network for gaming fans, began tracking play a few years ago.

Raptr just released its list of the 20 most-played games among its users in April. This method isn’t perfect since Raptr doesn’t log every gamer or even every system (it doesn’t log the 3DS or Vita), but it’s good for giving a glimpse at what people are playing.

We’ve embedded the list below:

Call of Duty: Black Ops II and League of Legends continue their stints at the top of the list, but Valve’s multiplayer online battle-arena game Dota 2 is making gains. In April, it jumped from fifth to third. That places it above Blizzard’s World of Warcraft for the first time ever.

Between League of Legends and Dota 2, MOBAs hold 10 percent of the total playtime among all Raptr members.

The only new title on the list is the multiplayer shooter Defiance for the PC, which placed ninth. Recent addition SimCity dropped off the list entirely.